Finding the Third Proportional to 400,707 and 624,037.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,707 : 624,037.50 = 624,037.50 : x
2. Step 2: Convert to fraction form
   400,707/624,037.50 = 624,037.50/x
3. Step 3: Cross multiply
   400,707x = 624,037.50 × 624,037.50
4. Step 4: Simplify right side
   400,707x = 389,422,801,406.25
5. Step 5: Solve for x
   x = 389,422,801,406.25/400,707
6. Step 6: Final answer
   x = 971,839.28